Laravel 8 Localisation Using mcamara package

I am trying to use multi language in my laravel 8 application frontend. I have used mcamara package, and set it up as per the guide on github.

I Have a form which accepts a input, which fetches the user. Based on the condition (if the user has taken survey, downloads a file. else shows the survey form and then redirects to download).

This is working absolutelyn fine in both languages. I am able to view the form in both languages, but once i enter the view page after id submission and i click on the language change button, i get this

SymfonyComponentHttpKernelExceptionMethodNotAllowedHttpException
The GET method is not supported for this route. Supported methods: POST.

The issue is only in the POST method. Rest works fine.
Can someone help me on how to fix this?

Thanks in advance.

My route file

Route::redirect('/', 'en');

Route::group(['prefix' => LaravelLocalization::setLocale()], function()
{

    Route::get('/', function () {
        return redirect()->route('certificate.download');
        // return view('welcome');
    });



    // Frontend
    Route::prefix('/registration')->group(function(){
        Route::get('/add', [RegController::class, 'RegEnqAppAdd'])-> name('reg.add');
        Route::get('signature_pad', [RegController::class, 'index']);
        Route::post('signature_pad', [RegController::class, 'store'])->name('signature_pad.store');
        Route::post('/store', [RegController::class, 'RegEnqAppAddStore'])-> name('reg.store');
        });

    // Frontend Downloads
    Route::prefix('/downloads')->group(function(){
        Route::get('/certificate', [DownloadController::class, 'DownloadCertificate'])-> name('certificate.download');
        Route::get('/addcertificate/{id}', [DownloadController::class, 'AddCertificate'])-> name('certificate.add');
        Route::get('/addcertificate/group/{id}', [DownloadController::class, 'AddCertificateGroup'])-> name('groupcertificate.add');
        Route::post('/storecertificate', [DownloadController::class, 'StoreCertificate'])-> name('certificate.store');
        Route::post('/viewcertificate', [DownloadController::class, 'ViewCertificate'])-> name('certificate.view');
        Route::get('/viewcertificates/{id}', [DownloadController::class, 'ViewCertificateRedirect'])-> name('certificateredirect.view');
        Route::get('/deletecertificate/{id}/{bid}', [DownloadController::class, 'DeleteCertificateBatch'])-> name('certificate.delete');
        Route::get('/deletegroupcertificate/{id}/{gid}', [DownloadController::class, 'DeleteCertificateGroup'])-> name('groupcertificate.delete');
        });

    // Frontend Surveys
    Route::prefix('/surveys')->group(function(){
        Route::get('/post-training-questionaire/{id}',   [SurveyController::class, 'PostTrainingQuestionaire'])-> name('surveys.posttraining');
        Route::post('/post-training-questionaire/store', [SurveyController::class, 'PostTrainingQuestionaireStore'])-> name('surveys.posttrainingstore');
        });
});
// Frontend Group
// Frontend Group

My Initial View File (id input)

@extends ('frontendlayouts.frontend_master')
@section ('frontendbody')

<script src="https://code.jquery.com/jquery-3.6.0.min.js"integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4="  crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p" crossorigin="anonymous"></script>

{{-- <link href="//netdna.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" rel="stylesheet"> --}}


    <div class="content-wrapper">
        <div class="container-full">

            <div class="row">
                <div class="col-md-12">

                    <div class="content-header">
                        <div class="d-flex align-items-center">
                            <div class="mr-auto">
                                <div>
                                    <img src="{{ asset('backend/images/amilogo.png') }}" width="150px" alt="">
                                </div>

                                <h3 class="page-title" style="border-right: none;">Downloads - Certificate Download</h3>
                                    <div class="align-items-center">
                                        <nav>
                                            <ol class="breadcrumb">
                                                <li class="breadcrumb-item"><a href="#"><i class="mdi mdi-home-outline"></i></a></li>
                                                <li class="breadcrumb-item active" aria-current="page">{{ __('Course Certificate') }}</li>
                                            </ol>
                                        </nav>
                                    </div>
                            </div>
                        </div>
                    </div>

                </div>
            </div>

            <section class="content">
                <div class="box">
                    <div class="box-header with-border">
                        <h4 class="box-title">{{ __('Enter Your CPR Number to Download Your Certificates') }}</h4>
                    </div>
                    <form class="form" method="post" action="{{ route('certificate.view') }}" enctype="multipart/form-data" id="posttrainingquestionaire">
                        @csrf
                        <div class="box-body">

                            <div class="row">
                                <div class="col-md-12">
                                    <div class="form-group">
                                        <label>{{ __('CPR Number') }}</label>
                                        <input type="text" name="cprnumber" id="cprnumber" class="form-control" maxlength="9" placeholder="CPR Number" required data-validation-required-message="This field is required">
                                    </div>
                                        @error('cprnumber')
                                        <span class="text-info">{{ $message }}</span>
                                        @enderror
                                </div>
                            </div>

                        </div>
                        <div class="box-footer">
                            <button onclick="$('#posttrainingquestionaire').submit()" class="btn btn-rounded btn-primary btn-outline">
                                <i class="ti-save-alt"></i> {{ __('Submit & Download') }}
                            </button>
                        </div>
                    </form>
                </div>
            </section>

        </div>
    </div>

@endsection

My view_certificate view

@extends ('frontendlayouts.frontend_master')
@section ('frontendbody')

<script src="https://code.jquery.com/jquery-3.6.0.min.js"integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4="  crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p" crossorigin="anonymous"></script>


    <div class="content-wrapper">
        <div class="container-full">

            <div class="content-header">
                <div class="d-flex align-items-center">
                    <div class="mr-auto">
                        <div>
                            <img src="{{ asset('backend/images/amilogo.png') }}" width="150px" alt="">
                        </div>

                        <h3 class="page-title" style="border-right: none;">Downloads - Certificate Download</h3>
                            <div class="align-items-center">
                                <nav>
                                    <ol class="breadcrumb">
                                        <li class="breadcrumb-item"><a href="#"><i class="mdi mdi-home-outline"></i></a></li>
                                        <li class="breadcrumb-item active" aria-current="page">{{ __('Course Certificate') }}</li>
                                    </ol>
                                </nav>
                            </div>
                    </div>
                </div>
            </div>

            <section class="content">
                <div class="box">
                    <div class="box-header with-border">
                        {{-- <h4 class="box-title">Enter Your CPR Number to Download Your Certificates</h4> --}}
                        <h1>{{ __('Welcome to Almoalem Institute') }}</h1>

                    </div>
                    <form class="form" method="post" action="{{ route('certificate.view' ) }}" enctype="multipart/form-data" id="posttrainingquestionaire">
                        @csrf
                        <div class="box-body">

                            <div class="row">
                                <div class="col-md-12">

                                    <div class="timeline-event">
                                        <div class="timeline-body">

                                            <div class="media-body">
                                                <div class="timeline-title"><strong>{{ __('CPR Number') }}:</strong></span> <span class="timeline-body">{{ $learnerData->cprnumber }}</span>
                                                    <br>
                                                <span class="timeline-title"><strong>{{ __('Full Name') }}:</strong></span> <span class="timeline-body">{{ $learnerData->fullname }}</span></div>
                                                <br>
                                                <br>

                                            </div>
                                        </div>
                                    </div>

                                    <div class="col-12">
                                        <div class="box">
                                            <div class="box-body no-padding">
                                                <div class="table-responsive">
                                                    <table class="table table-hover">
                                                        <tr>
                                                            <th>Sl. No</th>
                                                            <th>Course</th>
                                                            <th>Download Certificate</th>
                                                        </tr>
                                                        <?php $app =array(); ?>
                                                        @foreach($downloadData as $key => $dd)
                                                        <tr>
                                                            <td>{{ $key+1 }}</td>
                                                            <td>{{ $dd->applicationmanagement->courseapplied }}</td>
                                                            <td>
                                                                @if($dd->surveytaken!=NULL || in_array($dd->courseapplication_id, $app))
                                                                <?php $app[$key]=$dd->courseapplication_id;?>
                                                                <p class="text-black">
                                                                    <a  href="{{asset('certificate/'.$dd->certificate) }}" class="btn btn-primary md-5" target="_blank">{{ __('Download Certificate') }}</a>
                                                                </p>
                                                                @else
                                                                <a href="{{route('surveys.posttraining',$dd->id)}}" class="btn btn-dark md-5"> {{ __('Complete Training Feedback to Download Certificate') }}</a>

                                                                @endif
                                                            </td>
                                                        </tr>
                                                        @endforeach
                                                    </table>
                                                </div>
                                            </div>
                                        </div>
                                    </div>


                                </div>
                            </div>

                        </div>
                    </form>
                </div>
            </section>

        </div>
    </div>

@endsection